The proliferation of 'Like' type boxes has gotten rather absurd. We at Bitsum Technologies now use 3: Twitter, Facebook, and Google+1 (added today). There are several more we haven't added: Digg, Reddit, etc.. I wonder, how many are too many? When I like something, should I click them all? Will one eventually win out over the others? (it doesn't seem so) ..
Google's new +1 may be the most pervasive yet, being added to all Google search results. Will the other search engines follow? Probably. If there is one constant in technology, it is the 'me too' syndrome. Every good idea is copied a hundred times over.